Safety razor



March 7, 1933. o. R. PETERSON 1,900,662

SAFETY RAZOR Filed Jan. 16, 1932 2 Sheets-Sheet l INVENTOR BY |ns ATTORNEY W Q o. R. PETERSON V 1,900,662

SAFETY RAZOR March 7, 1933.

Filed Jan. 16, 1952 2 Sheets-Shet 2 INVENTOR BY HIS ATTORNEY M Patented Mar. 7, 1933 i 1 UNITED STATES PATENT OFFICE Application filed January 1a, 1932. aunt n. 587,082.

. This invention relates to safety razors of Fig.8 is aside ed eview of theraz'or fully thereciprocating type in which a blade asassembled as in the rst three views'. sembly unit is caused to reciprocate by) using Fig. 9 is a similar view with several of the the: razor and which blade unit may e 'conupper parts in vertical section in order to reveriiently disassembled for replacement of veal their structure. 55 the blade, Fig; 10 shows a part of the blade assembly The main object of my invention is to prounit, namely the cap plate for the blade. I

vide a reciprocating safety razor with a blade Fig. ll'is an end view of the same. unit which may be so readily taken apart Fig. 12 is a top plan view of the same plate 10 that it is substantially automatic inreleasing with a portion in section to disclose the exthe blade for renewal, v tent 0f the 810i? therein,

Another object is to provide such a razor Fig. 1?; shows a latch part which normally with known means for reciprocating the extends mto the slot' just mentioned in the blade unit when the razor is brought into app1ate.- 15 contact with the face of the person to be g-' lsflnothel W of-sflld latch part. shaved. Fig. 15 shows another part of the blade Another object is to-havearazorofthe chara s m ly unlt, or thebase plate therefor. acter indicated which may be used with or g- 16 15 another. View of the same as seen without the reciprocating feature at will by from below. 7 v. 20 merely changing the position of the razor g- 1 III-end ylew 0f the same base very slightl during use. a p Other ob ects and the various advantages Throughout'the y rgous VIEWS, the same i h t i th novel Structure b d i reference numerals indlcate the same or like my invention will appear more fully in detail P 25 as this specification Proceeds I In reciprocating razors, it is usually the In the accompanying drawings f i case that some featureof inconvenience enpart hereof, I ters lnto the'structure, inasmuch as the blade Fig. 1 is a perspective view of a reciprocat- 'fly 15 not reclplocated fi lbllt ing safety razor made according to my invenforms a P t an mbled unlt wh ch n 30 tion and embodying all the useful and novel movement the k along wlth features thereof in a ractical form. Such blade 1t ma be termed for Fig. 2' is a .view 0 the razor in operative Short, 15 therefor? assemble y meafls of a position for shaving with the reciprocating n screwed on a threaded stud, In some f' t i ti use o her more or less troublesome manner re- 3 is a top plan View o the razor of tamed 1n assembled condition. When it 1s Fi 1 desired to replace a blade in such a razor,ithe 4 is a Similar View to Fig 1 wherein structure presents an item of inconvemence h bla (1e assembly unit is more fully which may means loss of time and be annoy vealed by the raising of an upper frame or In th resent 'nvention however the bridge whereon a roller 1 l'veclprocatmgthe blade un it goes not have to bb removed from unit is carried. I

c the razor and yet, withal is disassembled at Fig. 5 1s a top plan view of therazor as a touch. I in Flg. 4. c Hence, in the practice of my invention, a

45 g- 6 Shows the pp P91171011 of F handle 1 is secured to a frame 2 havin a pair with the parts in the posltlon f gbut of corresponding jaws 3, 3 at one en and a with the blade and acap plate therefor reie f projections 4, 4 along the edges moved from the blade assembly unit. forming guards, while immediately within Fig. 7 is similar to Fig. 6, butv with all parts said guards, the frame has opposed and corre- 50 of the blade assembly unit removed. spending dove-tail gibs 5,5. A base plate24= which is provided with beveled edges 27, 27 is normally in slidable position between the gibs 5, 5 upon the frame 2 and retained thereon against loss as will immediately appear.

The handle is preferably secured to the frame by means of a threaded projection'30 which terminates in a stud-31 normally rojecting into an elongated slot 25' in the base plate 24. The latter may thus move along gibs 5, 5 to a limited extent, but may not be slid off the frame until the handle is unscrewed two or three threads, whereupon it may, of course be removed. A blade 11 of known type may be laid upon the base plate and the locating studs 17 17 of the base plate will pass through the apertures common to such blades and thus properly position the blade upon the'plate. Then, in order to secure the blade upon the plate, a cap plate 10 is placed upon the blade, the apertures therein similar to 33 causing the same to be accurately located with respect to both blade and base plate. Furthermore, the studs 17, 17 are each provided with undercut slots. 26, 26, while the cap plate has a pair of similar latching members 22, 22 provided with finger pieces 15, 15 by which to manipulate them and with inner latching edges 34 adapted to engage in said-slots. In order to positively cause engagement of said latching edges with said slots, each latch member is further provided with a horizontal plunger 21 extending partly into a projection 20 on the cap plate in which a spring 32 is located and against which said plunger bears. The spring tends to urge the plunger 21 outward and thereby draws the latch 22 outward with its latching edge 34, and this latches the respective end of the cap plate in position on the base plate over the blade and thus secures the same. Owing to the fact that the studs 17, 17 are rounded, the latching edges automatically give way against the spring pressure when the cap plate is forced down upon the studs, and

when the plate has been depressed to the place v where the same holds the blade down on the base plate, the latching edges snap into the slots on the studs and the latches and their finger pieces suddenly project outward.

However, in order to provide a definite normal position for the latch member and also to retainthe. same against loss, a slot 35 is provided therein near the larger slot 23' through which the stud passes. In the projection 20 upon each end of cap platelO there is a pin 19 fitted so as to extendthrough said slot 35, thus limiting movement of the memthe projection 13. The roller is preferably knurled to provide friction against the face 36 of the person shaving, which will cause the roller to rotate upon drawing the razor downward upon the face. In order to rotatably support the roller, a brid e indicated generally by 6 is hinged at t e end of frame 2 generally indicated at 18 and has a pair of lugs 16, 16 through which is inserted the pin 28 to serve as a pivot or shaft for said roller. The free end of the bridge has a pairof corresponding finger pieces 7,7 upon whose outer edges a pair of notches 12, 12 are formed, the'same being desi ned to engage the jaws 3, 3 of the frame. he finger pieces are somewhat resilient as they form a bifurcated end of the bridge, and when the same are slightly pressed together, they will be disengaged from the jaws of the frame because notches 12, 12 will be freed. When the bridge has been open .and is swung downward, the finger pieces will enter between the jaws and then snap into locked position, due to the fact that the notches will suddenl engage the jaws. hand, t e finger pieces are so formed exteriorly that when the fingers are pressed upon their outer ed es, the notches tend to release suddenly and the finger pieces to instantly slip upward out of the fingers, which action is effective to swing the bridge u ward into the position shown in Fig. 4. n this position, the blade assembly is accessible, and if the fingers are caused to press inward u on both finger pieces 15,-15 of the latch mem rs of the cap plate, said latch members will release the plate from the unit, as the blade will tend to straighten and will therefore raisethe cap plate to a certain extent. Both the cap plate and theblade may then be lifted off without further ado, when solely the base plate will remain in position upon the frame as seen in Fig. 6.

When\ a new blade is placed in position, I

and the cap plate again laid upon the base plate over the new blade, it is but necessary to press down the cap plate, when the latches will snap into engagement with the slots of the base plate studs, and the unit will be assembled. The bridge may then be swung down again until its finger pieces engage their notches with the frame jaws, and the bridge is locked while the roller has again engaged the projection on the cap plate. As the cam slot is diagonal, rotation of the roller will force the blade unit to move first in one direction and then in the opposite direction, and so on.

On the other R I v I y overlying said assembly which is removab y attached to said frame and which has means mounted thereon for reciprocating said blade assembly, and a projection upon said handle extending u into said plate in order to limit movement t ereof and retain the same and said unit' against loss when said bridge is removed, there being a slot in said plate forming a limited clearance for said handle projection.

2. A safety razor including the combination, with a handle, of a guard frame upon said handle having retaining gibs thereon,

a base plate slidablymounted between said gibs on said frame, a cap plate adapted to be located upon said base plate and retain a blade thereon, studs upon one plate extending into the other plate, there being slots in said studs, releasable latch members upon the latter plate adapted to engage said slots in said studs, whereby to secure said plates and the inserted blade in an assembled unit, and means for reciprocating said blade assembly unit, that is said plates and said blade.

3. A safety razor including the combination, with a handle, of a guard frame upon said handle having a pair of retaining gibs thereon, a base plate slidably mounted between said gibs on said frame, there being a slotin said plate, a threaded projection upon said handle screwed into said frame and terminating in a portion extending into the slot in said plate in order to provide for a limited movement of said plate and retain the same against loss, and means for attaching a blade tti said base plate including a removable cap p ate.

4. A safety razor including the combination, with a handle, of a guard frame attached'to said handle having retaining gibs thereon, a plate ,slidably retained between said gibs upon said frame, means upon said handle limiting movement of said plate and preventing removal of the same from said frame, a second plate detachably secured to said first plate in order to releasably retain a blade thereon, a shiftable support upon said frame, means upon said support for reciproeating said plate, and means upon said plate engageable by said means upon the support.

5. A safety razor including the combination, with a handle, of a guard frame mounted upon said handle, a base plate movably supported upon said guard frame, locating studs fixed upon said plate, there being slots in said studs, a second plate adapted to be erly located on said base placed upon said base late in order to retain a blade thereon an adapted to be propplate by engaging said studs, latch members. associated with said second plate and extending into the same and furthermore, engageable witlrsaid slots in order to retain the second plate assembled upon said base plate, finger pieces upon said latch 'members whereby to disengage the same from the slots in said studs, and springs urging said latch members into engagement with said slots, there being means to reciprocate said plates and the blade held thereby;

6. A safety razor comprisin a guard frame mounted on a handle, a lade base plate slidably mounted on'said guard frame, a blade, a blade cap plate, releasable means for securing said blade cap plate to said base plate, a bridge overlying said blade cap plate and detachably secured to an end of said guard frame, said blade base plate, bladeand .blade cap plate comprising a blade assembly guard.

In testimony whereof, I have signed my name to this specification.

OSCAR R. PETERSON. 

